That deadly highway pileup in Florida -- we just saw one survivor. Says it was as though someone was picking up cars and throwing them and when it was over. Ten people were dead and the wreckage of cars and trucks resembled. Some horrific special effect ABC's Matt Gutman is in Florida with the very latest on what may have caused all of this good morning to you -- Hey good morning -- -- Joshua was likely a brush fire that. -- -- this blanket of smoke that -- what eyewitnesses said was -- nearly apocalyptic scene. Vehicles mangled beyond recognition and -- first responders got there that smoke was so dense -- could actually see the victims they had to elicit. For -- modes in their screens. So -- was the small during national vehicles that this morning. Investigators are still trying to determine the exact number of collisions involved ten people were killed in this chain reaction -- Apparently blinded by a blanket of smoke in -- -- I 75 near Gainesville early Sunday morning. We get a mixture of a fault and smoke that combined. Made visibility factor and we had a series of crashes it's believed six cars five semi trailers you've been a motor home were involved. Those collisions triggered an informant that skeletons of eighteen wheelers and cars smoldered for hours -- smoke was so thick. First responders couldn't actually see the wounded amidst the tangle of metal and bodies. Garofalo was so dense that you can live together car and you get ahold of you and you see it's like being something that you've seen the -- And you never to thank you can happen. The Florida Highway Patrol police -- 62 acre brush fire was the source of the smoke fog and smoke related accidents are by far the most deadly type of accident. According to government data. Causing this forty plus car pileup near New Orleans in December. It's and the world's biggest pile up -- you buying three years ago. 227. Vehicles. Dense smoke or fog -- Highway Patrol -- first thing crack the window she if you can hear if there's an accident ahead of you. Don't stay in any of the lanes and if you see an off ramp. Get off the main road as quickly as you can. Josh -- coming in Florida thank you for that.

This transcript has been automatically generated and may not be 100% accurate.

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